Underclock cpu windows 10

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Since I am running the insider preview of Windows 10 I tried to create a Windows To Go USB drive with an older version of Windows, and ThrottleStop seems to be working properly on the older version. I saw that some people had issues with a microcode update disabling undervolting capabilities, but my laptop shouldn't be affected as it uses a Broadwell CPU.

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If there is another performance tuning application running, you must close it before trying to start this application'. But when I launch XTU I get the following error:

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Thinking that a windows update might have stopped ThrottleStop from working I tried to download Intel XTU. If I open ThrottleStop again, it shows that the current frequency is 0.00 MHz As soon as ThrottleStop launches, my CPU doesn't go over 2.2 GHz (Base clock), even after closing ThrottleStop The set multiplier option doesn't show the turbo frequencies Changing the offset voltage for the CPU or the cache seems to have no effect When going to the FIVR menu the Turbo ratio limits are greyed out and can't be changed Hi, I had been using ThrottleStop for some time to undervolt my laptop's CPU to reduce its temperature, but some time ago I noticed that ThrottleStop had a strange behaviour it did not have before.